The imminent dramatic conclusions to the ALCS and NLCS and next week's start of the 2011 World Series provide the perfect backdrop for baseball fans to further enjoy today's debut of Apple's iPhone 4S. To mark the events, MLB.com At Bat 11, the only official sports app honored in iPhone's App Store Hall of Fame, is available beginning today for a one-time price of $0.99. For more information, visit MLB.com.